Catalysis Letters

, Volume 80, Issue 1–2, pp 53–57 | Cite as

Mg-Doped WO3 as a Novel Photocatalyst for Visible Light-Induced Water Splitting

  • Dong Won Hwang
  • Jindo Kim
  • Tae Jin Park
  • Jae Sung Lee


Mg-doped WO3 with band gap energy of about 2.6 eV is a viable photocatalyst for visible light-induced water splitting in the presence of hole scavengers. The conduction band edge position of p-type Mg-doped WO3 was -2.7 V versus SCE at pH 12. By doping Mg on WO3, the conduction and valence band positions were shifted by 2.25 V negatively, leading to a conduction band edge position which was negative enough for H+ ions to be reduced thermodynamically, with little change in band gap energy. The negative shift in band position might be ascribed to lowering of the effective electron affinity of WO3 by doping Mg with a very low electron affinity.

Mg-doped WO3 photocatalyst visible light water splitting band position shift 


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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • Dong Won Hwang
    • 1
  • Jindo Kim
    • 2
  • Tae Jin Park
    • 1
  • Jae Sung Lee
    • 1
  1. 1.Department of Chemical Engineering and School of Environmental Science and EngineeringPohang University of Science and Technology (POSTECH)PohangRepublic of Korea
  2. 2.Clean Technology Research CenterKorea Institute of Science and TechnologySungbuk-gu, SeoulRepublic of Korea

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